Hub Audio

Free online audio tools

16 free audio tools that run in your browser. No account, no uploads, no watermarks.

A set of audio editors that run entirely in the browser. Because the decoding and encoding happen on your device, you can work on voice notes, interviews or anything else confidential without handing the recording to a third party.

All 16 audio tools

Audio Converter Convert M4A, OGG, FLAC, OPUS and more into MP3 or WAV, and change sample rate or channels. 100% in-browser. Audio Equalizer Boost the bass, lift a voice out of a muddy recording, or tame harsh treble — presets plus three tone controls. 100% in-browser. Audio File Info See the duration, sample rate, channels, bitrate, peak and average loudness, clipping and silence in any audio file. 100% in-browser. Audio Joiner Merge several MP3, WAV or M4A files into one track, in any order, with a crossfade or a gap. 100% in-browser. Audio Speed Changer Speed a recording up or slow it down from 0.25× to 4×, keeping the original pitch if you want. 100% in-browser. Audio Splitter Break a long MP3 or WAV into equal parts, fixed-length chunks, or pieces split at the silences. Zip download. 100% in-browser. Audio Trimmer Cut an MP3 or WAV to a start and end point, or delete a section from the middle. Drag-handle waveform. 100% in-browser. Fade In & Out Add a smooth fade in at the start and fade out at the end of an MP3 or WAV, with a choice of curves. 100% in-browser. Loop Audio Repeat a clip a set number of times or until it reaches a target length, with an optional crossfade. 100% in-browser. Pitch Shifter Raise or lower audio by up to twelve semitones while keeping the original speed — or change both together. 100% in-browser. Remove Silence Automatically cut the dead air, long pauses and silent lead-in from a recording. 100% in-browser. Reverse Audio Play an MP3 or WAV backwards, or make a boomerang that runs forwards then back. 100% in-browser. Stereo to Mono Turn stereo into mono, pull out just the left or right channel, swap the sides, or make mono into stereo. 100% in-browser. Tone Generator Make a sine, square, sawtooth or triangle tone at any frequency, or white, pink and brown noise, then download it. 100% in-browser. Volume Changer Make an MP3 or WAV louder or quieter by a set amount, or normalise it to a consistent level. 100% in-browser. Waveform Image Turn an MP3 or WAV into a waveform PNG with your own colours, bar style and transparent background. 100% in-browser.

How to use these tools

  1. Pick the tool you need from the list above — each one opens on its own page.
  2. Add your file or type your input. Nothing is uploaded; the work happens on your device.
  3. Adjust the options until the preview looks right.
  4. Download or copy the result. There is no watermark and no sign-up.

Frequently asked questions

Is my audio uploaded?

No. Files are decoded and re-encoded in the page on your own device, so the recording never reaches a server.

Which formats can I open and export?

You can open anything your browser decodes, typically MP3, WAV, M4A, AAC, OGG and FLAC. Exports are offered as WAV and MP3.

Will the quality drop?

Editing is done on the decoded audio, so a single pass loses nothing audible. Exporting to MP3 re-compresses, so choose WAV if you intend to edit again afterwards.

Does it work offline?

Yes, once the page has loaded. The tools are cached, so they keep working with no connection.

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